Toyota Camry Transmission Safe Mode 2007

When any of DTCs P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 are set, the ECM enters fail-safe mode. If either of the 2 sensor circuit malfunctions, the ECM uses the remaining circuit to calculate the accelerator pedal position to allow the vehicle to continue driving. If both of the circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is turned off.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

READ VALUE USING INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to the ON position and turn the tester on.

Select the following menu items: DIAGNOSIS /

ENHANCED OBD II / DATA LIST / ETCS / ACCEL POS

Read the value displayed on the tester.

Standard voltage

Accelerator Pedal Operations

ACCEL POS #1

ACCEL POS #2

Released ^ Depressed ^ Released

0.5 to 4.5 V

1.2 to 5.0 V

Difference between ACCEL POS #1 and ACCEL POS #2 is greater than 0.02 V

Difference between ACCEL POS #1 and ACCEL POS #2 is greater than 0.02 V

Go to step S

Go to step S

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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